Researchers say the Arctic Ocean crossed a biological tipping point in 2009, when nitrate levels in the water suddenly ...

Phytoplankton across most of the Arctic Ocean are now starving for nitrogen rather than struggling for light, a shift that ...

Scientists succeeded in thickening and lightening Arctic ice using seawater in an innovative climate experiment.

Melting Arctic ice is revealing a hidden world of nitrogen-fixing bacteria beneath the surface. These microbes, not the usual cyanobacteria, enrich the ocean with nitrogen, fueling algae growth that ...

For decades, scientists believed the Arctic Ocean was sealed under a massive slab of ice during the coldest ice ages — but new research proves otherwise. Sediment samples from the seafloor, paired ...

Two companies are aiming to preserve Arctic ice by pumping water onto the sheet and letting it freeze, but only one of the ...

Arctic sea ice hit its 2025 summer minimum without setting a record low on Sept. 10, despite a historically low winter maximum earlier in the year. Scientists say sea ice loss has slowed over the past ...

With the end of summer approaching in the Northern Hemisphere, the extent of sea ice in the Arctic shrank to its annual minimum on Sept. 10, according to NASA and the National Snow and Ice Data Center ...

Three Arctic seal species have been moved up to higher threat categories on the IUCN Red List, with one now endangered and two now near threatened. Global warming is melting away the sea ice they need ...

Arctic sea ice has large effects on the global climate. By cooling the planet, Arctic ice impacts ocean circulation, atmospheric patterns, and extreme weather conditions, even outside the Arctic ...

A hidden change in Arctic geography may have disrupted the ice age rhythm and transformed the global climate over thousands ...